Synthesis of the 3-Methylene-2-vinyltetrahydropyran Unit; the Hallmark of the Sesquiterpene, Hodgsonox
摘要:
The synthesis of some simple compounds containing the previously unreported 3-methylene-2-vinyltetrahydropyran system, a unique feature of the liverwort metabolite, hodgsonox is reported. Key features are the creation of an acrolein substituted in the a-position with a three-carbon chain bearing a terminal electrophilic site, addition of a vinyl group, and cyclization.
Efficient Stereochemical Relay en Route to Leucascandrolide A
作者:Sergey A. Kozmin
DOI:10.1021/ol015514x
日期:2001.3.1
the initial stereochemical information is central to the efficient and highly stereocontrolled construction of the C1-C15 fragment of the marine macrolide leucascandrolide A. Cyclic silane 3, assembled via Pt-catalyzed hydrosilylation, was designed to serve as a temporary template for the installation of the C12 stereogenic center. The strategy features a highly convergent C10-C11 bond construction